Preservation of nonclassical character during the amplification of a Schrödinger cat state

H. Huang, Shi Yao ZHU, M. S. Zubairy

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We examine the nonclassical property of a Schrödinger cat state, i.e., a superposition of two coherent states, when it is amplified by either a phase-sensitive or a phase-insensitive amplifier. In both cases the corresponding P representation remains nonpositive in some area of the complex plane, for any amplification factor. The contribution to the P function from these areas decreases exponentially with an amplification factor. With a phase-sensitive amplifier the onset of decay can be postponed to a larger amplification factor. Thus the nonclassical nature of the field can be preserved under a wide range of conditions, in spite of the noise introduced in the amplification process.

Original languageEnglish
Pages (from-to)1027-1030
Number of pages4
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume53
Issue number2
DOIs
Publication statusPublished - 1996

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Preservation of nonclassical character during the amplification of a Schrödinger cat state'. Together they form a unique fingerprint.

Cite this